Description: [Material]: Diamond Chain Saw sharpener made of emery plating, surface anti rust, wear resistance, high hardness, these are specially designed for chainsaws and steel, with long service life. [Chain Saw Sharpener Durable]: Diamond Chain Saw Sharpener Bits have a long service life and easy to operate. [Easy to Use]: These drill bits are specially designed for electric chain saw. polished without disassembling the chain, reducing the number of replacements improving work efficiency. [Size]: There are 3 sizes of our diamond drill bits(Optional Size), which are suitable for chain saws of different sizes. can also be used for model making and metal surface polishing. [Application]: Chain Saw Sharpener wide application for metal polishing like chain saw, jade, wood, model, steel, etc. Specification: Material: Steel Size Chart: total length: 4.5cm/1.77inchBlade length: 2.2cm/0.87inchOptional diameter size:0.4cm/0.16inch0.48cm/0.19inch0.55cm/0.22inch Package Includes: 12Diamond Chain Saw Sharpener Bits Note: Please allow slightly errors due to manual measurement and different monitors.